package filters;


import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
@WebFilter("/demo01.do")
public class Demo01Filter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
//        Filter.super.init(filterConfig);
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("helloA");
        // 放行
        filterChain.doFilter(servletRequest,servletResponse);
        System.out.println("helloA2");
    }

    @Override
    public void destroy() {
//        Filter.super.destroy();
    }
}
